Help with verizon Parental Controls?

Im 13 and my dads x wife bought my phone and her and my big bro (her son) still dont want me to have a bf.So i was just wondering if they have parental control on the account can they read my txt messages?
I know its a privacy thing but does parental control give them the right to read my messages?I dont live with them im just asking? I have the samsung alias if that helps.